Ring-engraving machine



May 15, 1928. I 1,670,136 v A. A. BUSH I RING ENGRAVING MACHINE Filed May 1. 1922' I s Sheets-Sheet 1 May '15, 1928. 1,670,136

A. A. BUSH RING ENGRAVING MACHINE Filed May 1. 1922 I 5 Sheets-Sheet Z IOI'Q M 756557 wemZ ar' May 15, 1928. 1,670,136'

A. A. BUSH I Patented May 15, 1928. I

; .uNirEu.-ism TE sf BUSH, or AK-non, onro ASSIGNOR TQ; THE FIRESTON'E mute Ann Regent ALBERTA.

com-Panzer Axnomj'orrio, A oonronncrron or onto;

RING-ENGRAVING' MACHINE;

pp e led; May

, This intention relates toanattachment for a milling or engraving machine,the;pu rpose of the; inventlon being to construct, a

fllhe particular purpose to which the pres- 7 ent inyention isdirected is'for cutting designs or figures on the interior of large steel I rings such as usedinmoldstoform the tread surface of tires. Heretofore,it has been customary. to secure the rings on the milling machines with Vises or clamps and after each cut is made on the interior of the ring to readjust and reclamp the ring to a new position. This has been a tedious operation, requiring considerable labor in handling the ring and in setting it accurately.

The present invention has for its object the provision of a device in which the ring can be mounted and by which thering can be turned and set so as to obtain easy and.

accurate adjustment, the device being simple in construction and capable of being placed on any standard form of milling machine.

ing is detailed, it will be understood that such changes in detail or modifications as may be made without altering the invention or departing from the essentials thereof as set forth in the claims, are covered herein,

In the drawings:

Figure l is a front elevation'of any standard form of milling machine with my attachment mounted thereon;

Figure 2 is a vertical section at the base of the ring holder on the line 22 of Figure 3;

Figure 3 is a transverse sectional View;

Figure 4 is a horizontal section through the ring holder;

Figure 5 is a fragmentary section of a ring illustrating the work to be done on the device ing cutter 2. Beneath the head is mounted the usual Work holding slide or table 3 which is arranged to be moved longitudinally and with a worm 12 formed on While the description given and the show- 1922. Serial No. 557,580.

transversely of the cutter head by screw, feeds andh, I

To the, top of thefslide or table isiseciure d aibearing platcvfi, ontheupper surface of which isanounted an arcuate guide or cradle 7, in whiclrare formed guideways 8- designed to receive the ring= carnie1'; or work holder 9,

1O bcing secured on the'cradle to hold the ring in position and; being capable of locking the ring inposit-ioirby tightening the boltslot, v I the. outer; surface of the carrieris, formed a series of gear teeth 11 which mesh a shaft 13 mounted in the cradle 7. i r

The mold ring which is intended to be cut or engraved is designated by the numeral 14,

and the designs to be cut therein are of any;

form, certain ones being shown in Figures 5v and 6. The usual form of mold ringis provided with tapering or inclined surfaces on its outer periphery, such surfaces being indicated by the numerals 15, and these surfaces may be utilized conveniently for hold-- ing the mold ring in place,-although for other types of rings different clamping devices could be substituted, the invention not being limited to the engraving of this particular type of ring. l

In order to mountthis mold ring on the interior of the rotating carrier 9, I provide a plurality of separated blocks or standards 16, the innersurfaces of which are tapered as at 17 to fit one of the tapered surfaces of the mold ring. Theblocks are held in place by set screws 18. Opposite the stationary m blocks 16 there arearranged a plurality of shiftable blocks 19, the inner surfaces of which are, inclined in a reverse direction from the surfaces in blocks 16, the arrangement being such that as the blocksare drawn together the mold ring will be firmly which pass through their innerends.

It will be seen that the machine is intended to be operated in the following manner:

Approximate blocks 16 and 19 are mounted on the inner surface of the carrier ring and after the mold ring is securely clamped in placethecarriage 3 is fed to present the Work to the cutting tool. When a'single out has been made, the carrier ring is rotated the required distance to give the next cut, by rotation of the shaft 13, Any suitable means, as an in-dexing'device, may be mounted on the shaft 13, such an expedient being Well known in the art and therefore not being" illustrated. By simultaneously rotating the shafts 4 and 13, any spiral figure may be cutiin the ring, and any desired meansmay be provided to accomplish this purpose.

The mechanism shown and described saves considerable time and labor in the cutting of rings such as described and provides a-more accurate means of spacing forma- I tions' such as shownin Figures 5 and 6; It

is easy to operate and will give a much larger production e per machine.

- What I claim is: v

1. A machine including the combination with a milling cutter head of a cradle ar carrier for clamping a ring therein by en gagement with the outer periphery thereof to present the inner periphery of the ring to the cutter; i Y

2; A machine including the combination with a milling cutter head of a cradle arranged below said head, means for moving the cradle longitudinally of the head, an

annular carrier in the cradle and extending about the head in a vertical plane, means for circumferentially rotating the carrier, and

means on the carrier: fol-clamping a ring 'thereinby engagement With the outer periphery thereof to present the inner periph- 

